This wasn't in his vague 'get in, get out' plan he'd plotted out while waiting at Platform 3, watching her then as she set about cleaning her hands before letting the issue go with a dismissive look away. A glance to his bandaged arm, before he goes to pick up his cane. No threat of leaving, however, as he does not go for his clothing, and instead, twists the walking stick piece around enough to draw the wand out from inside it, turning his back to her as he does so.

"Impervius," is muttered, directed down at the looped cloth buckled tight around his arm, and save for a vague shimmer through the air that seemed to settle on white cloth, that's all there is. Presumably, it will work.

He pushes wand back into sheath, adding, "As you insist," over his shoulder.